Glass ribbon and method for producing the same

Abstract

A glass ribbon has a thickness of 100 μm or less and comprises a convex curved surface portion or a side surface. The glass ribbon can be produced by heating a preform glass material having a thickness of 2 mm or less, and subjecting the preform glass material to drawing so that the preform glass material has a thickness of 100 μm or less.

1 . A glass ribbon having a thickness of 100 μm or less, and comprising convex curved surface portion on both side surfaces. 
     
     
         2 . A glass ribbon according to  claim 1 , wherein the side surfaces are constituted of the convex curved surface portion entirely. 
     
     
         3 . A glass ribbon according to  claim 1 , wherein the convex curved surface portions are of fire-polished surfaces. 
     
     
         4 . A glass ribbon according to  claim 1 , wherein thickness unevenness is 20% or less of the thickness. 
     
     
         5 . A glass ribbon according to  claim 1 , wherein an aspect ratio of a width to the thickness is 25 to 2000. 
     
     
         6 . A glass ribbon according to  claim 1 , wherein a glass material for the glass ribbon is a crystallized glass. 
     
     
         7 . A glass ribbon according to  claim 1 , wherein the glass ribbon is wound around a bobbin having a flange. 
     
     
         8 . A glass ribbon according to  claim 7 , wherein the glass ribbon is wound in a state of being superimposed on a packaging buffer sheet. 
     
     
         9 . A method of producing a glass ribbon, the method comprising the steps of:
 heating a preform glass material having a thickness of 2 mm or less; and   subjecting the preform glass material to a drawing so that the preform glass material has a thickness of 100 μm or less.   
     
     
         10 . A method of producing a glass ribbon according to  claim 9 , wherein the preform glass material has a viscosity of 6.0 to 9.0 dPa·s during the drawing. 
     
     
         11 . A method of producing a glass ribbon according to  claim 9 , wherein the drawing is performed by winding the glass ribbon around a drum.